High-Efficiency Separation of Single-Wall Carbon Nanotubes by Self-Generated Density Gradient Ultracentrifugation
High-Efficiency Separation of Single-Wall Carbon Nanotubes by Self-Generated Density Gradient Ultracentrifugation
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DOI：
10.1021/jp1100329
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发表时间：
2011-02-10
影响因子：
3.7
通讯作者：
Kataura, Hiromichi
中科院分区：
文献类型：
--
作者：
Feng, Ye;Miyata, Yasumitsu;Kataura, Hiromichi
我们报告了一种有效的密度梯度超速离心（DGU）方法，利用自生密度梯度分离金属和半导体单壁碳纳米管（SWCNT）。使用均匀密度的 SWCNT 分散体（碘克沙醇中 33% v/v）完全填充离心管。超速离心后，金属和半导体 SWCNT 的分离达到了与使用阶梯状密度梯度的 DGU 达到的纯度相当的程度。由于在此过程中单壁碳纳米管分散在整个管内，因此可以一次分离大量的单壁碳纳米管。
We report an efficient density gradient ultracentrifugation (DGU) method for separation of metallic and semiconducting single-walled carbon nanotubes (SWCNTs) using a self-generated density gradient. A uniform-density SWCNT dispersion (33% v/v in iodixanol) was used to completely fill a centrifuge tube. After ultracentrifugation, separation of the metallic and semiconducting SWCNTs was achieved with a purity comparable to that achieved by DGU using a steplike density gradient. Because the SWCNTs were dispersed within the entire tube during this procedure, a large amount of SWCNTs can be separated at one time.